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Old 10-10-2012, 08:17 AM
jdauria jdauria is offline
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Quote:
Originally Posted by Bengal2 View Post
Is this the N52 engine?

I don't know how to find that out for sure if it is the N52 engine but I do have a 2007 X3.

I have never used my CPO before. After scheduling the appt, am I just charged $50 for them to take a look at my car? What if it is not a CPO covered service and I choose to not get the service done at this time, is the cost still the $50? It is all so confusing to me and the answer is not easy to find. I can't seem to get the dealer to tell me how the cost of this initial appt works.

Thank you for your reply-
From my understanding, BMW dealership will charge their customers just for them to inspect the vehicles. After their initial inspection they will tell you what's wrong, and how much your going to need to spend.

I was asking about your engine type because I believe in 2007 they switched from the M54 to N52. I believe yours looks like this one? (http://en.wikipedia.org/wiki/BMW_N52).

I did a few searches on the web for you, and this article/answer I found may help:

The 6-cylinder engine in your 2007 X3 3.0si is from the N52 engine family (most 6-cylinders from 2007 to current, and some 2006). This engine is well known for the hydraulic tappet (lifter) noise. This has been typically attributed to too much oil bleed off in the cylinder head oil galleries that supply the pressurized oil to the tappets.

BMW has the following three “fixes”, which are only performed if the customer complains enough … and in the right way:

1) Perform tappet bleed-down procedure (typically does not provide a permanent fix).

2) Replace the tappets with an improved unit that bleeds down slower (sometimes cures the issue).

3) Replace the complete cylinder head with an improved unit that does not bleed oil pressure and flow as quickly and keeps more oil at the tappets when the engine is not running. This is of course the most expensive fix, but it is the final fix.

We could not locate a service or repair bulletin on this, but most people must really hound the dealer and request a review by the regional BMW rep. in order to achieve the final cylinder head fix. Don’t give up …. BMW is obviously well aware of this issue since they have redesigned the head and the tappets. They are just not so interested in replacing cylinder heads under warranty.

As for the dealer, in your case, refusing to go further unless they can reproduce the noise, try taking a video of it with the noise happening … show it to the regional rep.
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